CN116507255A

CN116507255A - Dust collector

Info

Publication number: CN116507255A
Application number: CN202180070458.2A
Authority: CN
Inventors: 金滉; 玄起卓; 高廷旻
Original assignee: LG Electronics Inc
Current assignee: LG Electronics Inc
Priority date: 2020-10-16
Filing date: 2021-10-15
Publication date: 2023-07-28
Also published as: US20230404347A1; EP4230104A1; WO2022080930A1; KR20220050526A

Abstract

The invention relates to a dust collector, comprising: an intake unit for sucking air containing dust; a suction motor generating a flow of the air to flow the air into the suction part; a cyclone part communicating with the suction part, separating the dust from the air; a handle which is arranged in the opposite direction of the suction part based on the cyclone part and comprises a holding part for holding by a user; and a power supply unit that supplies power to the suction motor; the longitudinal axis of the suction motor is arranged perpendicular to the longitudinal axis of the suction portion and parallel to the bottom surface of the power supply portion.

Description

Dust collector

Technical Field

The present invention relates to a vacuum cleaner, and more particularly, to a vacuum cleaner configured such that a longitudinal axis of a suction inlet is perpendicular to a longitudinal axis of a suction motor.

Background

In general, a vacuum cleaner is an electric home appliance that sucks small dust or dirt by sucking air using electricity and fills the small dust or dirt into a dust cartridge in a product, and is generally called a vacuum cleaner.

Such a vacuum cleaner may be classified into a manual vacuum cleaner, which is a vacuum cleaner that a user directly moves and cleans the vacuum cleaner, and an automatic vacuum cleaner, which is a vacuum cleaner that automatically travels and cleans the vacuum cleaner. The manual vacuum cleaner may be classified into a canister type vacuum cleaner, an upright type vacuum cleaner, a hand-held vacuum cleaner, a stick type vacuum cleaner, etc., according to the type of the vacuum cleaner.

Conventionally, a canister type cleaner has been used in many household cleaners, but in recent years, a hand cleaner and a stick type cleaner, which are integrally formed with a dust cylinder and a cleaner main body, have been increasingly used to improve the convenience of use.

In the canister type dust collector, the main body and the suction inlet are connected by a rubber hose or tube, and the brush can be assembled to the suction inlet according to circumstances.

The hand-held cleaner (handvacuumcleaner) maximizes portability, while being lightweight, but is short in length, and thus may be limited in sitting cleaning areas. Thus, it is used for cleaning local places such as on a desk or a sofa or in an automobile.

The stick-type cleaner can be used standing, so that cleaning can be performed without bending down. Therefore, the cleaning device can be moved over a wide area and cleaned. If the hand-held cleaner is said to clean a narrow space, the wand cleaner can clean a wider space and can clean a high place which cannot be reached by an adversary. In recent years, stick cleaners have been provided in a module form, and thus, the types of cleaners have been actively changed according to various objects to be used.

As a conventional document of the stick type vacuum cleaner, a hand-held vacuum cleaner is disclosed in korean laid-open patent publication No. 10-2018-0102604. The hand-held vacuum cleaner comprises a main body, cyclonic separating apparatus, a wand (wand) and a cleaner head.

In addition, the main body has an upper portion accommodating the motor and the blower unit and a lower portion accommodating a power source in the form of a battery pack.

The motor and fan unit are disposed with their longitudinal axes oriented in the same direction as the longitudinal axis of the inlet duct, and this arrangement lengthens the length of the motor and fan unit that projects in the wrist direction, and as a result, when the user grips the handle to clean, a large amount of interference occurs on the upper side of the wrist, which may be inconvenient.

On the other hand, in the construction of the stick cleaner, the suction motor and the battery are required to be disposed at appropriate positions as relatively heavy members so that the user can feel less load when cleaning.

As another prior art document of the stick type dust collector, in the dust collector disclosed in korean laid-open patent publication No. 10-2019-0136544, a suction motor is disposed such that its rotation axis is parallel to a straight line passing through the center of gravity of a foreign matter separation part.

Further, the cleaner disclosed in korean laid-open patent publication No. 10-2019-0136544 includes a handle disposed at an upper portion of a battery, and a suction motor disposed in front of the handle.

However, as described above, if the suction motor having a large weight is disposed in front of the handle, there is a problem in that the center of gravity is inclined forward.

On the other hand, when the center of gravity is inclined to one side by the suction motor and the battery with respect to the handle held by the user, the wrist of the user receives moment force, and when the load of such moment force is continuously received, the wrist of the user is burdened.

Disclosure of Invention

Problems to be solved by the invention

The invention aims to provide a dust collector, which can reduce the load applied to the wrist of a user when the user cleans by optimizing weight balance.

Further, an object of the present invention is to provide a dust collector capable of increasing a dust accommodating capacity by increasing a height of a dust cylinder.

Further, an object of the present invention is to provide a vacuum cleaner capable of reducing interference with a wrist when a user grips a handle for cleaning, when a suction motor is disposed behind the handle.

Further, an object of the present invention is to provide a vacuum cleaner capable of improving information awareness of a user by providing a display unit with a wide area.

Means for solving the problems

In order to achieve the above object, a preferred embodiment of the present invention is a vacuum cleaner comprising: an intake unit for sucking air containing dust; a suction motor generating a flow of the air to allow the air to flow in through the suction part; a cyclone part communicating with the suction part to separate the dust from the air; a handle which is arranged in the opposite direction of the suction part based on the cyclone part and comprises a holding part for holding by a user; and a power supply unit that supplies power to the suction motor; the longitudinal axis of the suction motor is arranged perpendicular to the longitudinal axis of the suction portion and parallel to the bottom surface of the power supply portion.

In this case, the suction motor may be disposed at an upper portion of the handle, and the power supply unit may be disposed at a lower portion of the handle.

Further, a grip extension line formed by extending a tangent line in contact with the outer peripheral surface of the grip portion is arranged to be spaced apart from the outer peripheral surface in the radial direction of the suction motor by a predetermined distance without penetrating the suction motor.

The center of gravity of the suction motor may be disposed in a direction opposite to the suction portion with respect to a longitudinal axis of the grip portion.

In another aspect, the vacuum cleaner according to a preferred embodiment of the present invention may further include a rear cover disposed at a rear side with respect to the handle, the rear cover having a cylindrical shape, wherein the suction motor is accommodated and mounted, and wherein an inclined surface is provided on a part of an outer peripheral surface of the rear cover, the inclined surface being formed to face a user during the cleaning operation.

In this case, a display unit for displaying the operation state of the cleaner may be disposed on the inclined surface.

The suction portion may be disposed at an upper portion spaced apart from the grip portion by a predetermined distance.

Further, the suction portion may have a longitudinal shaft disposed to penetrate at least a part of the suction motor.

In addition, the cleaner of a preferred embodiment of the present invention may further include a discharge cover coupled to one side of the suction motor in a length direction of the suction motor, and provided with an air discharge part discharging air remaining after filtering the dust.

The air discharge portion may include a plurality of openings provided at predetermined intervals, and each of the openings may be provided in a direction perpendicular to an axis of the suction motor in a state where the discharge cover is coupled to the suction motor.

Effects of the invention

In the vacuum cleaner according to the preferred embodiment of the present invention, since the suction motor is disposed such that the center of gravity of the suction motor is formed behind the axis in the longitudinal direction of the handle, the moment force due to the center of gravity of the suction motor can be prevented from tilting forward, and as a result, the load applied to the wrist of the user when the user performs cleaning can be reduced.

In addition, in the dust collector according to a preferred embodiment of the present invention, the suction motor is disposed behind the shaft in the longitudinal direction of the handle, so that the height of the dust tube can be increased, and as a result, the dust storage capacity can be increased.

In the vacuum cleaner according to the preferred embodiment of the present invention, the suction motor is disposed behind the handle such that the longitudinal axis of the suction motor is perpendicular to the longitudinal axis of the suction portion and parallel to the bottom surface of the power supply portion, so that the length of the suction motor protruding rearward of the handle can be minimized, and the portion that is in contact with the wrist and interferes with the user when the user grips the handle for cleaning can be reduced.

In the vacuum cleaner according to the preferred embodiment of the present invention, the rear cover accommodating and mounting the suction motor is provided with an inclined surface which is provided to correspond to the length of the rear cover, and the inclined surface is provided with a display portion, so that the display portion can be formed in a wide area. Therefore, the information awareness of the user can be improved.

Drawings

Figure 1 is a perspective view of a vacuum cleaner in accordance with an embodiment of the present invention.

Figure 2 is a side view of a cleaner in accordance with an embodiment of the present invention.

Figure 3 is a top view of a vacuum cleaner in accordance with an embodiment of the present invention.

Figure 4 is a longitudinal cross-sectional view of a cleaner in accordance with an embodiment of the present invention.

Fig. 5 is a B-B cross-sectional view of fig. 2.

Fig. 6 is a diagram for explaining an arrangement structure of the inclined surface.

Fig. 7 is a view for explaining a configuration of a display unit in a case where the cleaner is placed on a charging stand for charging after the cleaning operation is completed.

Fig. 8 is a longitudinal sectional view for illustrating the flow of air in the cleaner.

Figure 9 is a cross-sectional view A-A of figure 2 showing the flow of air within the cleaner.

Figure 10 is a cross-sectional view B-B of figure 2 showing the flow of air within the cleaner.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention is capable of various modifications and various embodiments, and therefore, specific embodiments are shown in the drawings and will be described in detail below. It is not intended to limit the invention to the particular embodiments but is to be construed as covering all alterations, equivalents, and even alternatives included within the spirit and technical scope of the invention.

In describing the present invention, the terms first, second, etc. may be used to describe various structural elements, but the structural elements may not be limited by the terms. The term is used merely to distinguish one structural element from other structural elements. For example, a first structural element may be termed a second structural element, and, similarly, a second structural element may be termed a first structural element, without departing from the scope of the present invention.

The term "and/or" may include a combination of a plurality of related documents or any of a plurality of related documents.

When referring to a certain structural element as being "connected" or "coupled" to another structural element, it is understood that it may be directly connected or coupled to the other structural element, but other structural elements may also be present therebetween. Conversely, when a structural element is referred to as being "directly connected" or "directly coupled" to another structural element, it should be understood that there are no other structural elements therebetween.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The expression in the singular may include the expression in the plural unless the context clearly indicates otherwise.

In this application, it is to be understood that the terms "comprises" or "comprising," etc., are merely intended to specify the presence of the features, integers, steps, actions, structural elements, components, or combinations thereof described in the specification, but do not preclude the presence or addition of one or more other features, integers, steps, actions, structural elements, components, or groups thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries may be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In addition, the following examples are provided for a more complete understanding of those skilled in the art, and the shapes and sizes of structural elements in the drawings may be exaggerated for more specific explanation.

Fig. 1 is a perspective view of a cleaner 1 according to an embodiment of the present invention, fig. 2 is a side view of the cleaner 1 according to an embodiment of the present invention, fig. 3 is a plan view of the cleaner 1 according to an embodiment of the present invention, fig. 4 is a longitudinal sectional view of the cleaner 1 according to an embodiment of the present invention, and fig. 5 is a cross-sectional view B-B of fig. 2.

Referring to fig. 1 to 5, a cleaner 1 according to an embodiment of the present invention may include a main body 2. The main body 2 may include a suction part 10 that sucks air containing dust.

When the direction of the axis A1 along which the suction unit 10 is disposed is defined as the front-rear direction, the direction of one side where the suction unit 10 is located is defined as the front, and the direction of the other side where the suction motor 20, which will be described later, is defined as the rear. The direction of the axis A3 along which the cyclone flow of the cyclone unit 30 described later is arranged is defined as the up-down direction.

The body 2 may be formed in an external shape by a plurality of covers.

As an example, the main body 2 may include: the first cover 3 is disposed in front of the main body 2 and is substantially cylindrical; and a second cover 4, which is substantially cylindrical, and is coupled to the upper side of the first cover 3. In addition, the main body 2 may include a rear cover 210 disposed at the rear of the main body 2. At this time, the second cover 4 may be connected to the rear cover 210 through the third cover 6, the longitudinal directions of the first cover 3 and the second cover 4 may be arranged along the up-down direction of the main body 2, and the longitudinal direction of the rear cover 210 may be arranged to be perpendicular to both the front-back direction and the up-down direction. In other words, when the direction along which the axis A1 of the longitudinal direction of the suction portion 10 is arranged is referred to as the x-axis direction, the longitudinal direction of the rear cover 210 may be arranged along the y-axis direction, and the longitudinal directions of the first cover 3 and the second cover 4 may be arranged along the z-axis direction.

On the other hand, when the first cover 3 and the second cover 4 are shown to be disposed in front of the main body 2 and the rear cover 210 is shown to be disposed in rear of the main body 2, the longitudinal axis A4 of the grip portion 450 of the handle 40, which will be described later, may be used as a reference. (refer to FIG. 2)

The upper end portion of the first cover 3 and the lower end portion of the second cover 4 may have an open shape, respectively. That is, the first cover 3 may include an upper side opening, and the second cover 4 may include a lower side opening. The above-described coupling of the second cover 4 to the upper side of the first cover 3 may indicate that the upper opening of the first cover 3 is coupled to the lower opening of the second cover 4. In addition, the diameter D3 of the second cover 4 may be greater than the width W of the third cover and the length D4 of the rear cover. (refer to FIG. 3)

The suction portion 10 is a cylindrical shape with an opening inside, is a constituent element for sucking air containing dust, and can provide a suction flow path through which the air containing dust can flow. Through the suction part 10, air containing dust can be guided to the main body 2.

The main body 2 may further include a suction motor 20, a cyclone part 30, a handle 40, and a power supply part 50.

Here, the suction motor 20 is configured to generate a flow (i.e., an airflow) of air so that the air containing dust can flow in through the suction portion 10. The suction motor 20 may be accommodated to the rear cover 210. (refer to FIG. 4)

The rear cover 210 is cylindrical with a predetermined diameter, and in this case, the suction motor 20 may be mounted in parallel with the longitudinal direction of the rear cover 210 and accommodated in the rear cover 210.

The suction motor 20 may include a motor shaft 220 and an impeller 230 connected to the motor shaft 220 and performing a rotating motion.

The suction motor 20 may be a BLDC (brushless dc) motor. The BLDC motor is a type of DC motor without a brush. Since the BLDC motor has no brush as a wear part, it has advantages of less electric and mechanical noise, no problem in high-speed rotation, and less rotation noise.

The cyclone unit 30 communicates with the suction unit 10, and is configured by a principle of a dust collector using centrifugal force in order to separate dust sucked into the main body 2 by the suction unit 10.

As an example, the cyclone part 30 may include a first cyclone 310 capable of separating dust by cyclone flow. The first cyclone 310 may communicate with the suction part 10. The air and dust sucked through the suction part 10 spirally flow along the inner circumferential surface of the first cyclone 310. The axis A3 of the cyclone flow of the first cyclone 310 may extend in the up-down direction.

The cyclone part 30 may further include a second cyclone 330 to re-separate dust in the air discharged from the first cyclone 310. At this time, the second cyclone 330 may be located inside the first cyclone 310 to minimize the size of the cyclone part 30. The second cyclone 330 may include a plurality of cyclone bodies configured in parallel. The air discharged from the first cyclone 310 may be divided into a plurality of strands and passed through the cyclone body.

At this time, the axis A3 of the cyclone flow of the second cyclone 330 may extend in the up-down direction, and the axis A3 of the cyclone flow of the first cyclone 310 and the axis A3 of the cyclone flow of the second cyclone 330 may be formed coaxially in the up-down direction, and may be collectively referred to as the axis A3 of the cyclone flow of the cyclone unit 30.

The main body 2 may further include a cyclone filter 350 configured to surround the second cyclone part 330. As an example, the cyclone filter 350 is formed in a cylindrical shape, and guides the air separated from the dust in the first cyclone part 310 to the second cyclone 330. The cyclone filter 350 may filter dust during the passage of air.

To this end, the cyclone filter 350 may include a mesh part (mesh) having a plurality of holes. Although not limited thereto, the mesh part may be formed of a metal material.

On the other hand, as another example, the cyclone unit 30 may have a single cyclone, and in this case, the axis A3 of the cyclone flow may extend in the up-down direction.

The handle 40 is disposed in the opposite direction of the suction unit 10 with respect to the cyclone unit 30 as a component that can be gripped by a user to move the cleaner 1, and includes a grip 450 as a portion to be gripped by the user's hand. Here, the grip 450 has a substantially cylindrical shape and has a longitudinal axis A4. The grip 450 may be disposed with its upper portion inclined forward. The handle 40 and the third housing 6 may have an integral form.

The power supply unit 50 includes a battery 510 as a component for supplying power to the suction motor 20. The power supply portion 50 may be disposed adjacent to the handle 40 at an upper side and adjacent to a part of a lower portion of an outer peripheral surface of the dust tube 60 described later at a front side.

The main body 2 may further include a dust cartridge 60 for storing dust separated in the cyclone part 30.

The dust cartridge 60 may include a dust collection body 610 in a cylindrical shape. As an example, the upper side of the dust collecting body 610 may function as the first cyclone 310 without providing the first cyclone 310 additionally. The second cyclone 330 may be located wholly or at least partially within the dust bin 60.

A dust storage guide 604 guiding the dust separated in the second cyclone 330 may be disposed in the dust collection body 610. The dust storage guide 604 may be coupled to the lower side of the second cyclone 330.

The dust storage guide 604 divides the space inside the dust collection body 610 into a first dust storage part 602 and a second dust storage part 606, the first dust storage part 602 storing dust separated in the first cyclone 310, and the second dust storage part 606 storing dust separated in the second cyclone 330. In other words, the inner space of the dust storage guide 604 is the second dust storage part 606, and the space between the dust storage guide 604 and the dust collecting body 610 is the first dust storage part 602.

Hereinafter, preferred embodiments of the vacuum cleaner 1 of the present invention will be described mainly with respect to the arrangement relation of the respective constituent elements.

Referring again to fig. 1 to 5, the first cover 3 may include a first cyclone 310, a second cyclone 330, and a dust barrel 60. More specifically, an upper portion of the first cover 3 may be defined as the first cyclone 310, the second cyclone 330 may be received into the inside of the first cover 3, and a lower portion of the first cover 3 may be defined as the dust cylinder 60 described above.

The suction portion 10 may be disposed at a portion where the first cover 3 and the second cover 4 are joined. More specifically, the suction flow path of the suction portion 10 may be configured in such a shape that a part thereof communicates with the first cover 3 and another part thereof communicates with the second cover 4.

Further, the handle 40 and the power supply unit 50 are disposed behind the first cover 3, and the third cover 6 is disposed at a portion connecting the second cover 4 and the rear cover 210.

On the other hand, in the cleaner 1 according to the preferred embodiment of the present invention, the longitudinal axis A2 of the suction motor 20 is arranged perpendicular to the longitudinal axis A1 of the suction portion 10 and parallel to the bottom surface B of the power supply portion 50. At this time, the longitudinal axis A1 of the suction portion 10 is also arranged parallel to the bottom surface B of the power supply portion 50.

Unlike the preferred embodiment of the present invention, it is assumed that the longitudinal axis A2 of the suction motor 20 is arranged parallel to the longitudinal axis A1 of the suction portion 10. That is, this is the case where the suction motor 20 extends along the axis A1 in the longitudinal direction of the suction portion 10. In such a configuration, since the long axis of the suction motor 20 is disposed in the front-rear direction, the main body of the cleaner is protruded longer in the direction in which the wrist extends when the handle 40 is held. This has a problem of poor grip feeling.

In contrast, in the vacuum cleaner 1 according to the preferred embodiment of the present invention, the long axis A2 of the suction motor 20 is arranged perpendicular to the front-rear direction of the vacuum cleaner 1, so that one component of the main body 2 can be prevented from protruding excessively rearward of the grip 450. Therefore, when the user grips the handle 40 for cleaning, a portion that comes into contact with the wrist to cause interference can be reduced.

In the cleaner 1 according to the preferred embodiment of the present invention, the outer peripheral surface of the rear cover 210 has a circular shape when the cleaner 1 is viewed from the side. Thus, when the user grips the handle 40 for cleaning, a natural curved surface can be formed in a direction extending from the back of the hand toward the wrist. Therefore, there is an advantage in that the user's feeling of gripping the cleaner 1 is further improved.

On the other hand, the rear cover 210 may include an inclined surface 215 on which the display portion 250 is disposed.

Fig. 6 is a diagram for explaining the arrangement structure of the inclined surface 215.

Referring to fig. 6, the inclined surface 215 may be provided on a part of the outer peripheral surface of the rear cover 210, and the inclined surface 215 may be formed to face the user when the cleaning operation is performed. Specifically, the inclined surface 215 may be disposed to face rearward, and the upper end of the inclined surface 215 may be disposed to face forward in an inclined manner. As an example, the angle formed by the inclined surface 215 and the axis A3 of the cyclone flow of the cyclone unit 30 may form an angle of 30 degrees to 45 degrees.

The inclined surface 215 may be disposed to face the rear upper side of the main body 2. That is, with the provision of the inclined surface 215, the rear cover 210 has a cylindrical shape with a rear upper side cut away to correspond to the shape of the inclined surface 215.

The display unit 250 disposed on the inclined surface 215 may display the operation state of the cleaner 1. At this time, since the inclined surface 215 is inclined toward the user, the user can easily confirm the state of the cleaner 1 (for example, the remaining amount of the battery, the suction strength of the suction motor, etc.) displayed on the display unit 250 during cleaning.

Although not limited thereto, the display unit 250 may be in the form of a display screen including a plurality of light emitting units.

In the case where the display unit 150 is disposed on the inclined surface 215 provided on a part of the outer peripheral surface of the rear cover 210, the length D4 of the rear cover 210 and the length of the inclined surface 215 may be substantially the same. That is, the display portion 250 may be configured to have a long lateral length so as to correspond to the length D4 of the rear cover 210.

With the above configuration, the display portion 250 disposed on the inclined surface 215 has a wide area, and the user's knowledge of the operation state of the cleaner 1 displayed on the display portion 250 is improved, thereby having an advantage of increasing the user's convenience.

On the other hand, as the display portion 250 is formed in a wide area, various information on the state of the cleaner 1 can be displayed.

Fig. 7 is a view for explaining a configuration of the display unit 250 in a case where the cleaner 1 is placed on the charging stand for charging after the cleaning operation is completed.

When the cleaner 1 is set in the direction shown in fig. 7 and the suction unit 10 is set to the lower side, the display unit 250 may be configured to turn the contents displayed on the display screen upside down.

For this purpose, a sensor for determining whether or not the screen is inverted may be provided in the main body 2. (e.g., geomagnetic field sensor, accelerometer, etc.) therefore has the advantage that the user can easily confirm the state of the cleaner 1 even when the cleaner 1 is resting on a charging stand.

On the other hand, an operation unit (not shown) may be disposed on the inclined surface 215 together with the display unit 250. The user can input an operation or a stop instruction of the cleaner 1 through the operation unit. On the other hand, as described above, when the display portion 250 and the operation portion are disposed on the same inclined surface 215, there is an advantage in that convenience in operation of the cleaner 1 by the user is increased.

In a preferred embodiment of the present invention, the suction motor 20 may be disposed at an upper portion of the handle 40, and the power supply portion 50 may be disposed at a lower portion of the handle 40. That is, the handle 40 may be disposed between the suction motor 20 and the power supply portion 50.

At this time, the grip extension lines L1 and L2 formed by extending the tangential line contacting the outer peripheral surface of the grip 450 may be arranged to be spaced apart from the suction motor 20 by a predetermined distance in the radial direction.

More specifically, the handle extension lines L1 and L2 may be virtual extension lines L1 and L2 formed by extending from the outermost profile pivot points P1 and P2 protruding to the outside of the grip 450 along a tangent line contacting the grip 450 when the main body 2 is cut along a plane including the longitudinal axis A1 of the suction portion 10 and viewed.

(refer to FIG. 4)

Since the handle extension lines L1, L2 are disposed to be spaced apart from the suction motor 20 by a predetermined distance in the radial direction, the handle extension lines L1, L2 do not penetrate the suction motor 20. In other words, the handle extension lines L1, L2 and the suction motor 20 are not connected at any point. In other words, the handle extension lines L1, L2 are configured not to meet any part of the suction motor 20.

Thus, the center of gravity G1 of the suction motor 20 may be disposed rearward of the handle extension lines L1, L2. The center of gravity G1 of the suction motor 20 may be disposed in a direction opposite to the suction portion 10 with respect to the axis A4 in the longitudinal direction of the grip portion 450.

With such an arrangement, the center of gravity G1 of the suction motor 20 can be formed closer to the wrist of the user. Therefore, the moment force due to the center of gravity G1 can be reduced, and the load applied to the wrist of the user can be reduced, and further, the cleaning operation is less likely to be fatigued when the cleaning operation is performed for a long period of time.

On the other hand, as described above, the grip 450 of the handle 40 is disposed with its upper portion inclined forward. Thus, the center of gravity G2 of the power supply unit 50 may be disposed forward of the axis A4 in the longitudinal direction of the grip 450. That is, the center of gravity G1 of the suction motor 20 and the center of gravity G2 of the power supply unit 50 may be disposed in opposite directions with respect to the axis A4 in the longitudinal direction of the grip 450. (refer to FIG. 4)

With such an arrangement, the center of gravity G2 of the power supply unit 50 as one of the heavier components and the center of gravity G1 of the suction motor 20 as the other of the heavier components are disposed in opposite directions with respect to the grip portion 450 as a portion to be gripped by the user, thereby having an effect of optimizing the weight balance of the main body 2.

Meanwhile, in the handle 40, a connection part 451 may be formed at a side of the grip part 450 adjacent to the suction motor 20. The connection portion 451 may be formed in a naturally extended shape having a curved surface with a predetermined radius without a step at a portion where the outer peripheral surface of the rear cover 210 and the grip portion 450 are joined.

Thus, when the user grips the grip 450, the connection portion 451 is placed between the thumb and index finger of the user, and the heavy suction motor 20 is supported on the back of the hand, so that the cleaner 1 can be supported in a more stable manner when the cleaning operation is performed.

On the other hand, the bottom surface B of the power supply unit 50 and the bottom surface B' of the dust tube 60 (which may also be referred to as the bottom surface of the first cover 3) may have a height difference, instead of being on the same plane. That is, the bottom surface B of the power supply portion 50 and the bottom surface B' of the dust tube 60 may be configured to have different heights from each other. (refer to FIG. 2 and FIG. 4)

It should be noted that, since the suction motor 20 and the battery 510, which are relatively heavy constituent elements, are disposed above the power supply portion 50, the bottom surface B of the power supply portion 50 is preferably protruded further downward.

Thus, when the bottom surface B of the power supply portion 50 is placed on the floor surface, the main body 2 of the cleaner 1 is not tilted in the direction of the dust cylinder 60 and can be stably supported.

In addition, the shaft A1 of the suction portion 10 in the longitudinal direction may be formed at an upper portion of the grip portion 450 of the handle 40, and may be disposed to penetrate at least a portion of the suction motor 20. More specifically, the longitudinal axis A1 of the suction portion 10 disposed at the connecting portion between the first cover 3 and the second cover 4 may be disposed at an upper portion spaced apart from the grip portion 450 of the handle 40 by a predetermined distance, in other words, the longitudinal axis A1 of the suction portion 10 may be disposed so as not to penetrate the grip portion 450 of the handle 40. (refer to FIG. 2 and FIG. 4)

Conventionally, when the suction motor 20 is disposed at the upper portion of the cyclone unit 30, there is a limit to increasing the height of the first cover 3 when considering the length of the suction motor 20. Therefore, the longitudinal axis A1 of the suction portion 10 that needs to be disposed near the upper end of the first cover 3 can only be disposed so as to penetrate the grip portion 450 of the handle 40.

In contrast, according to the preferred embodiment of the present invention, since the suction motor 20 is disposed at the upper portion of the handle 40, the height of the second cover 4 disposed at the upper portion of the cyclone unit 30 can be reduced, and the height of the upper end portion of the first cover 3 can be increased as compared with the conventional one.

Therefore, in the state where the entire height of the main body 2 is the same, the height of the first cover 3 can be increased as compared with the conventional one, so that the height of the dust tube 60 can be made higher, and the capacity of the dust tube 60 to accommodate dust can be increased. In this regard, there is an advantage in that the inconvenience of requiring frequent emptying of the dust cartridge 60 can be reduced depending on the user's angle.

On the other hand, the main body 2 may further include a prefilter 71 disposed at an upper portion of the cyclone part 30. The prefilter 71 is a component for filtering out dust that is not collected in the cyclone unit 30.

A part of the prefilter 71 may be accommodated in the first casing 3, and another part may be accommodated in the second casing 4. An air guide 75 for guiding the air discharged from the cyclone part 30 to the pre-filter 71 may be provided between the cyclone part 30 and the pre-filter 71.

Here, the prefilter 71 may be a mesh filter (mashfilter) having a cylindrical shape. As an example, the prefilter 71 may be made of nylon (nylon) or a release nonwoven fabric (spin-bonded fabric). The release nonwoven fabric is one produced by spinning synthetic fibers such as polypropylene (PP) and bonding the spun synthetic fibers by heating.

The air guide 75 is formed in a conical shape with a narrow lower portion and a wide upper portion. In addition, the lower portion of the air guide 75 is coupled to the upper side of the cyclone part 30, and the upper portion of the air guide 75 is coupled to the lower portion of the prefilter 71, so that the air discharged from the second cyclone 330 can flow to the suction motor 20 without being mixed with the air flowing in through the suction part 10.

In addition, the upper portion of the pre-filter 71 of the main body 2 may further include a HEPA filter (HEPA filter). The hepa filter 72 may be integrally accommodated inside the second housing 4.

The hepa filter 72 plays a role of final filtering of the fine dust which is not filtered in the prefilter 71.

The air discharged from the cyclone part 30 and passing through the prefilter 71 passes through the hepa filter 72, passes through the suction motor 20, and is discharged to the outside.

Although in the prior art the position of the HEPA filter 72 is configured so that air is discharged to the outside of the cleaner 1 through the HEPA filter 72 after passing through the suction motor 20, in a preferred embodiment of the present invention, since the suction motor 20 is a brushless direct current (Brushless DC) motor, even though the HEPA filter 72 configured to filter dust before the air flows to the suction motor 20 is configured, the foreign substances at the final end of the air flow are less scattered.

In the present invention, although the cleaner 1 including the prefilter 71 and the hepa filter 72 is described, the kind and number of filters are not limited.

On the other hand, in a preferred embodiment of the present invention, the body 2 may further include a discharge cap 270.

The discharge cover 270 is a component detachably coupled to the rear cover 210 along the longitudinal direction of the suction motor 20. An air discharge portion 275 filtering dust and discharging remaining air to the outside of the main body 2 may be provided at the discharge cover 270.

Referring to fig. 6, the discharge cap 270 includes: a first cover 271 formed in a circular shape; and a second cover 273 coupled to the first cover 271 and extending a predetermined length from an edge of the first cover 271 in a cylindrical shape.

More specifically, the discharge cover 270 may have a cylindrical shape with one side in the longitudinal direction in an open shape, and the open side of the discharge cover 270 and one side in the longitudinal direction of the rear cover 210 may be detachably coupled to each other.

On the other hand, the second cover portion 273 of the discharge cover 270 is provided with an air discharge portion 275 for discharging the air passing through the suction motor 20. At this time, the air discharge portion 275 may include a plurality of openings provided at predetermined intervals on the second cover portion 273. Here, each of the openings may be provided to penetrate the second cover portion 273 in a rectangular shape.

On the other hand, when taking a state in which the discharge cover 270 is coupled with the rear cover 210 as a reference, each of the openings of the air discharge portion 275 may be opened in a direction perpendicular to the axis A2 of the longitudinal direction of the suction motor 20. When the impeller 230 of the suction motor 20 rotates, air flows to the discharge cover 270 in the length direction 20 of the suction motor 20 and is discharged to the outside of the main body 2 through the opening of the air discharge portion 275.

The air discharge portion 275 may not be formed in at least a part of the second cover portion 273 of the discharge cover 270. That is, the air discharge portion 275 may be provided only at a portion of the second cover portion 273 of the discharge cover 270.

As an example, the air discharge portion 275 may be provided only on the upper side of the discharge cover 270, based on the state where the discharge cover 270 is coupled to the rear cover 210. In this case, when the cleaner 1 is tilted in the cleaning direction during the cleaning, the air discharged from the main body 2 is discharged only in the cleaning direction. Accordingly, the air discharged from the main body 2 can be prevented from being discharged in the direction of the user.

Fig. 8 to 10 are views showing the flow of air in the cleaner.

Referring to fig. 8 to 10, air containing dust is sucked through the suction part 10 by the operation of the suction motor 20. The air flows horizontally in a tangential direction of the inner circumferential surface of the first cyclone 310 through the suction part 10, flows rotatably along the inner circumferential surface, and descends. In descending air, dust and air are subjected to centrifugal forces of different magnitudes due to density differences. Accordingly, the heavier dust is discharged downward vertically to be collected in the first dust storage part 602 of the dust cartridge 60.

On the other hand, the descending air flows into the second cyclone 330 in a reverse direction to form an ascending air flow at a moment, and the air flowing into the second cyclone 330 is separated from the dust again. The dust separated from the air in the second cyclone 330 flows downward again and is stored in the second dust storage 606. The air separated from the dust in the second cyclone 330 is discharged from the second cyclone 330 and rises toward the pre-filter 71 through the air guide 75.

The air filters the fine dust that is not filtered out as it passes through the pre-filter 71. In addition, the air passing through the pre-filter 71 passes through the HEPA filter 72 before reaching the suction motor 20.

The air passing through the hepa filter 72 moves in the direction of the suction motor 20 through the second cover 4 and passes through the third cover 6, the air passing through the hepa filter 72 and finally filtered out dust flows into the suction motor 20, flows inside the suction motor 20 along the axis of the motor shaft 220 by the rotation of the impeller 230, and is discharged to the outside of the main body 2 through the air discharge portion 275 of the discharge cover 270.

As described above, in the vacuum cleaner according to the preferred embodiment of the present invention, since the suction motor is disposed such that the center of gravity of the suction motor is formed behind the axis in the longitudinal direction of the handle, the moment force due to the center of gravity of the suction motor can be prevented from tilting forward, and as a result, the load applied to the wrist of the user when the user performs cleaning can be reduced.

In the vacuum cleaner according to the preferred embodiment of the present invention, the suction motor is disposed behind the shaft in the longitudinal direction of the handle, so that the height of the dust tube can be increased, and as a result, the dust storage capacity can be increased.

While specific embodiments of the present invention have been described and illustrated, the present invention is not limited to the described embodiments, and it is understood that various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be determined by

The technical ideas described in the claims are determined not by the embodiments.

Claims

1. A vacuum cleaner, comprising:

an intake unit for sucking air containing dust;

a suction motor generating a flow of the air to allow the air to flow in through the suction part;

a cyclone part communicating with the suction part, separating the dust from the air;

a handle which is arranged in the opposite direction of the suction part based on the cyclone part and comprises a holding part for holding by a user; and

a power supply unit for supplying power to the suction motor,

the longitudinal axis of the suction motor is arranged perpendicular to the longitudinal axis of the suction portion and parallel to the bottom surface of the power supply portion.

2. A vacuum cleaner according to claim 1, wherein,

the suction motor is disposed at an upper portion of the handle, and the power supply unit is disposed at a lower portion of the handle.

3. A vacuum cleaner according to claim 1, wherein,

a handle extension line formed by extending a tangent line in contact with the outer peripheral surface of the grip portion is arranged at a predetermined distance from the outer peripheral surface of the suction motor in the radial direction, and does not penetrate the suction motor.

4. A vacuum cleaner according to claim 1, wherein,

the center of gravity of the suction motor is disposed in the opposite direction of the suction portion with respect to the longitudinal axis of the grip portion.

5. A vacuum cleaner according to claim 1, wherein,

and a rear cover body which is disposed at the rear of the handle and is cylindrical, accommodates and mounts the suction motor,

an inclined surface is provided on a part of the outer peripheral surface of the rear cover, and the inclined surface faces the user when the cleaning operation is performed.

6. A vacuum cleaner according to claim 5, wherein,

the inclined surface is provided with a display part for displaying the operation state of the dust collector.

7. A vacuum cleaner according to claim 1, wherein,

the longitudinal axis of the suction portion is disposed at an upper portion spaced apart from the grip portion by a predetermined distance.

8. A vacuum cleaner according to claim 1, wherein,

a longitudinal shaft of the suction portion is disposed to penetrate at least a part of the suction motor.

9. A vacuum cleaner according to claim 1, wherein,

the dust filter further comprises a discharge cover which is combined with one side of the suction motor along the length direction of the suction motor, and an air discharge part for discharging air remained after filtering the dust is arranged.

10. A vacuum cleaner according to claim 9, wherein,

the air discharge part comprises a plurality of openings which are arranged at intervals,

each of the openings is provided in a direction perpendicular to an axis of a longitudinal direction of the suction motor in a state where the discharge cover is coupled with the suction motor.